<?php

namespace app\admin\controller;

use Throwable;
use app\common\controller\Backend;

/**
 * 分类管理
 */
class Category extends Backend
{
    /**
     * Category模型对象
     * @var object
     * @phpstan-var \app\admin\model\Category
     */
    protected object $model;

    protected string|array $defaultSortField = 'weigh,asc';

    protected array|string $preExcludeFields = ['id', 'published_time', 'updated_time', 'deleted_time'];

    protected array $withJoinTable = ['parent'];

    protected string|array $quickSearchField = ['id'];

    public function initialize(): void
    {
        parent::initialize();
        $this->model = new \app\admin\model\Category;
    }

    /**
     * 查看
     * @throws Throwable
     */
    public function index(): void
    {
        // 如果是 select 则转发到 select 方法，若未重写该方法，其实还是继续执行 index
        if ($this->request->param('select')) {
            $this->select();
        }

        /**
         * 1. withJoin 不可使用 alias 方法设置表别名，别名将自动使用关联模型名称（小写下划线命名规则）
         * 2. 以下的别名设置了主表别名，同时便于拼接查询参数等
         * 3. paginate 数据集可使用链式操作 each(function($item, $key) {}) 遍历处理
         */
        $res = $this->model->where('parent_id', 0)->select();
        $data = [];
        foreach ($res as $item) {
            $data[] = $item;
            $children = $this->model->where('parent_id', $item->id)->select();
            foreach ($children as $child) {
                $child->title = '└─ ' . $child->title;
                $data[] = $child;
            }
        }

        $this->success('', [
            'list' => $data,
            'total' => count($data),
            'remark' => get_route_remark(),
        ]);
    }

    public function select(): void
    {
        $res = $this->model->where('parent_id', 0)->select();
        $data = [];
        foreach ($res as $item) {
            $data[] = [
                'id' => $item->id,
                'title' => $item->title,
            ];
            $children = $this->model->where('parent_id', $item->id)->select();
            foreach ($children as $child) {
                $data[] = [
                    'id' => $child->id,
                    'title' => '└─ ' . $child->title,
                ];
            }
        }

        $this->success('', [
            'list' => $data,
            'total' => 0,
            'remark' => get_route_remark(),
        ]);
    }

    /**
     * 若需重写查看、编辑、删除等方法，请复制 @see \app\admin\library\traits\Backend 中对应的方法至此进行重写
     */
}